An insulator element 3' to the CFTR gene binds CTCF and reveals an active chromatin hub in primary cells.
Blackledge NP, Ott CJ, Gillen AE, Harris A. An insulator element 3' to the CFTR gene binds CTCF and reveals an active chromatin hub in primary cells. Nucleic Acids Res. 2009 Mar; 37(4):1086-94.